/* 
 * Copyright (c) 2009, Giora Kosoi giorak@gmail.com
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in the
 *       documentation and/or other materials provided with the distribution.
 *     * Neither the name of the project nor the
 *       names of its contributors may be used to endorse or promote products
 *       derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY Giora Kosoi ''AS IS'' AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL Giora Kosoi BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include <sparrow/timed_buffer.h>
#include <sparrow/reactor.h>
#include <sparrow/variant_headers.h>
#include <sparrow/util.h>
#include <sparrow/errors.h>

TimedBuffer::TimedBuffer(Reactor *r, const std::string &config_)
    :   Handler(r),
        token_(-1),
        buff(NULL)
{
    WordVector words;
    parse_words(config_, words);
    if(words.size() != 3)
    {
        throw_error<std::logic_error>(__FILE__, __LINE__,
                "incorrect number of arguments for timed buffer: config = %s", 
                config_.c_str());
    }

    VariantInt32 elements(words.at(0));
    VariantInt32 delay_sec(words.at(1));
    VariantInt32 delay_nsec(words.at(2));

    max_elem = elements.int32();
    max_delay.tv_sec = delay_sec.int32();
    max_delay.tv_nsec = delay_nsec.int32();

    register_input(0, this, &TimedBuffer::input);
    register_once(this, &TimedBuffer::once);

}

TimedBuffer::~TimedBuffer()
{
}

void TimedBuffer::input(VariantSet *v)
{
    if(buff == NULL)
    {
        buff = new VariantSet;
    }

    buff->insert(v);

    if(buff->array_size() == max_elem)
    {
        push(0, buff);
        buff = NULL;
    }
}

void TimedBuffer::once(VariantSet *v)
{
    token_ = get_reactor()->create_token();
    get_reactor()->schedule_timer(this, max_delay, token_);
}

void TimedBuffer::handle_timeout(uint64_t token)
{
    if(buff != NULL)
    {
        push(0, buff);
        buff = NULL;
    }
}


